Still, the Cleveland fan base is snapping up Manziel jersey and eager to see if he can lead the franchise to its first playoff win since its 1999 rebirth.

Manziel went 20-6 during his two years as a starter for Texas A&M. In 2012, he became the first freshman to win the Heisman Trophy. A threat with his arm and legs and nicknamed "Johnny Football," Manziel piled up 9,989 yards of total offense and 93 touchdowns (63 passing, 30 rushing) for the Aggies.

The Browns have four of their six rookies under contract with training camp six weeks away.

Johnny Manziel received his first regular-season action in Week 2, taking three snaps against the Saints. The rookie handed off twice and threw one incomplete pass in the Browns' come-from-behind win. (Photo: Andrew Weber, USA TODAY Sports)

Browns players and coaches have praised Manziel's early approach, showing appreciation for his work ethic and willingness to keep a low profile in the locker room, something rookies are generally expected to do no matter how famous. (Photo: Andrew Weber, USA TODAY Sports)

Tutoring Manziel will be Cleveland offensive coordinator Kyle Shanahan, who helped Robert Griffin III to offensive rookie of the year honors with the Redskins in 2012. (Photo: Andrew Weber, USA TODAY Sports)